Groups > sci.physics.relativity > #377825

Re: Mars mission-a grave problem

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	sci.physics.relativity
Subject	Re: Mars mission-a grave problem
Date	Thu, 03 Mar 2016 22:57:40 +0100
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Jackpol11@hotmail.com wrote:

> I don't see anything mentioned about the problem sending someone to
> Mars. Presumably he would land at the closest approach of Mars.  Mars
> period is 687 days, while Earth's is 365 days.
> After landing, when Earth coincides with Mars, it races away around
> the orbit ahead of the slower Mars. it will be 2.3 years before his
> next trip back home.
> 
> The time required for the angular rate difference to accumulate to 2pi
> is given by solving for T:
>     2pi=(2pi/365 - 2pi/687)T
> 1 = (1/365- 1/687)T = 1/778T
>      T =778 days =2.3 years to next opposition

This has nothing to do with the theory of relativity; it is off-topic here.  
It does not have anything to do with physics either, so it is off-topic in 
the entire sci.physics.* hierarchy.  The appropriate newsgroup for this 
subject is located in the sci.space.* hierarchy.  Thank you in advance for 
observing the rules.

PointedEars
-- 
Q: Why is electricity so dangerous?  
A: It doesn't conduct itself.

(from: WolframAlpha)

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Thread

Mars mission-a grave problem Jackpol11@hotmail.com - 2016-03-02 11:40 -0500
  Re: Mars mission-a grave problem paparios <paparios@gmail.com> - 2016-03-02 09:52 -0800
  Re: Mars mission-a grave problem Tom Roberts <tjroberts137@sbcglobal.net> - 2016-03-02 12:10 -0600
    Re: Mars mission-a grave problem Emigdio Sophronius <emigg@augustvisitors.org> - 2016-03-02 20:41 +0000
      Re: Mars mission-a grave problem Jackpol11@hotmail.com - 2016-03-02 23:03 -0500
        Re: Mars mission-a grave problem Helénē Swanhild <helenes@gardenclosure.org> - 2016-03-03 20:39 +0000
  Re: Mars mission-a grave problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-03-03 22:57 +0100

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